In this April 20, 2013 photo, Courtney Widener, right, walks up the red carpet with a friend as her brother, U.S. Airman Casey Widener, left background, out of focus, watches their arrival at Liberal High School in Liberal, Kan. Courtney wanted her brother, Senior Airman Casey Widener, recently returned from Afghanistan, to escort her to front door of the school, but school officials denied her request stating that at 22, he was too old to participate. The high school principal responsible for the denial has apologized, saying the intent was not to dishonor him. Deputy Superintendent Paul Larkin said Tuesday, April 30, 2013 that a policy change allowing exceptions to the age restriction will be presented at Monday’s school board meeting. (AP Photo/Leader & Times, Earl Watt)

Seven-time Tour de France winner Lance Armstrong awaits the start of the 2010 Cape Argus Cycle Tour in Cape Town in this March 14, 2010 file photo. A spate of troubling stories in the first quarter of 2013 show an altogether darker and more disturbing side to the glamorous, multi-billion-dollar global sport industry. In January, American cyclist Armstrong admitted in a television interview that he had doped before each of his record seven Tour de France victories. His confession after years of denial followed the United States Anti-Doping Agency's (USADA) decision to strip him of the title and accuse him of being at the centre of the "most sophisticated, professionalised and successful doping programme that sport has ever seen". REUTERS/Mike Hutchings/Files

A general view of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

A general view of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Part of the building of 'Unit 61398', a secretive Chinese military unit, is seen in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria (CHINA - Tags: POLITICS SCIENCE TECHNOLOGY MILITARY) - RTR3DZ82

Part of the building of 'Unit 61398', a secretive Chinese military unit, is seen in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria (CHINA - Tags: POLITICS SCIENCE TECHNOLOGY MILITARY) - RTR3DZ82

Locals walks in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

People walk past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Motorcyclists ride past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

A Chinese People's Liberation Army soldier stands guard in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Locals walks in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

People walk past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Motorcyclists ride past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

A Chinese People's Liberation Army soldier stands guard in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Locals walks in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

People walk past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Motorcyclists ride past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

A Chinese People's Liberation Army soldier stands guard in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

Locals walks in front of 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria

People walk past 'Unit 61398', a secretive Chinese military unit, in the outskirts of Shanghai, February 19, 2013. The unit is believed to be behind a series of hacking attacks, a U.S. computer security company said, prompting a strong denial by China and accusations that it was in fact the victim of U.S. hacking. REUTERS/Carlos Barria